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uniq(1) 						      General Commands Manual							   uniq(1)

Name
       uniq - report repeated lines in a file

Syntax
       uniq [-udc[+n][-n]] [input[output]]

Description
       The  command  reads  the  input	file comparing adjacent lines.	In the normal case, the second and succeeding copies of repeated lines are
       removed; the remainder is written on the output file.  Note that repeated lines must be adjacent in order to be found.  For further  infor-
       mation, see

Options
       The n arguments specify skipping an initial portion of each line in the comparison:

       -n Skips specified number of fields.  A field is defined as a string of non-space, non-tab characters separated by tabs and spaces from its
	  neighbors.

       +n Skips specified number of characters in addition to fields.  Fields are skipped before characters.

       -c Displays number of repetitions, if any, for each line.

       -d Displays only lines that were repeated.

       -u Displays only unique (nonrepeated) lines.

       If the -u flag is used, just the lines that are not repeated in the original file are output.  The -d option specifies  that  one  copy	of
       just the repeated lines is to be written.  The normal mode output is the union of the -u and -d mode outputs.

       The  -c option supersedes -u and -d and generates an output report in default style but with each line preceded by a count of the number of
       times it occurred.

See Also
       comm(1), sort(1)

																	   uniq(1)

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uniq(1) 						      General Commands Manual							   uniq(1)

NAME
uniq - report repeated lines in a file SYNOPSIS
fields] chars] [input_file [output_file]] DESCRIPTION
reads the input text file input_file, comparing adjacent lines, and copies the result to output_file. If input_file is not specified, the standard input and standard output are used. If input_file is specified, but output_file is not, results are printed to standard output. input_file and output_file must not be the same file. Line-Comparison Options recognizes the following options when comparing adjacent lines: Print those lines that are repeated in the original file. Print copy only of each repeated line in the input file. Generate an output report in default style except that each line is preceded by a count of the number of times it occurred. If this option is specified, the and options are ignored if either or both are also present. If none of the options or are present, prints the results of the union of the and options, producing a copy of the original input file with the second and succeeding copies of any repeated lines removed. (Note that repeated lines must be adjacent in order to be found -- see sort(1)). Field-Skip Options Two options are provided for skipping an initial portion of each line when making comparisons: Ignore the first fields fields, together with any blanks before each. fields is a positive decimal integer. A field is defined as a string of non-space, non-tab characters separated by tabs and/or spaces from its neighbors. Ignore the first chars characters. chars is a positive decimal integer. Each line in the input is assumed to be terminated with a new line character for purposes of comparison. Fields are skipped before characters. EXTERNAL INFLUENCES
Environment Variables must be equal to the value it had when the input files were sorted. determines the interpretation of text within files as single- and/or multi-byte characters, and defines a space character when the or option is used. determines the language in which messages are displayed. If or is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty variable. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multi-byte character code sets are supported. RETURN VALUE
Exit values are: 0 Successful completion. >0 Error condition occurred. AUTHOR
was developed by OSF and HP. SEE ALSO
comm(1), sort(1). STANDARDS CONFORMANCE
uniq(1)
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